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生物质化学工程 ›› 2009, Vol. 43 ›› Issue (2): 27-33.

• 论文 • 上一篇    下一篇

麸皮对里氏木霉Rut C-30产 纤维素酶的促进作用

艾斌凌, 王义强, 陈介南   

  1. 中南林业科技大学, 生物环境科学与技术研究所, 湖南, 长沙, 410004
  • 收稿日期:2008-11-05 修回日期:1900-01-01 出版日期:2009-03-30 发布日期:2009-03-30
  • 通讯作者: 陈介南,教授,博士,博士生导师,研究领域为生物质能源.E-mail:jnc001@yahoo.com.

Enhancement of Bran to Cellulase Production by Trichoderma reesei Rut C-30

AI Bin-ling, WANG Yi-qiang, CHEN Jie-nan   

  1. Institute of Biological and Environmental Science and Technology, Central South University of Forestry and Technology, Changsha 410004, China
  • Received:2008-11-05 Revised:1900-01-01 Online:2009-03-30 Published:2009-03-30

摘要: 本研究尝试通过里氏木霉Rut C-30添加适量的麸皮以及利用实验设计软件Design-Expert寻找适宜的麸皮与微晶纤维素的配比来研究麸皮对里氏木霉Rut C-30产纤维素酶的影响.结果表明,适当的麸皮添加量能够促进纤维素酶的生产;通过二元二次正交旋转组合设计,确定了微晶纤维素添加量和麸皮添加量分别为12.23和23.50 g/L的优化产酶条件.此条件下,在250 mL摇瓶中滤纸酶活达到6.383 FPIU/mL,得率系数为521.913 FPIU/g;在.5 L发酵罐中,滤纸酶活为6.80 FPIU/mL,得率系数为556.582 FPIU/g.相比于优化前,优化后摇瓶实验和发酵罐实验中滤纸酶活分别提高了14.24%和1.403%.而纤维素酶的得率系数却分别降低了6.584%和4.005%.分别以酸解杨木残渣和蒸汽爆破杨木浆替代微晶纤维素作为碳源,最终获得最高滤纸酶活1.953 FPIU/mL和1.45 FPIU/mL.

关键词: 里氏木霉, 纤维素酶, 正交旋转组合设计, 细胞比生长速率, 纤维素酶比合成速率

Abstract: The effect of bran content on cellulase production by Trichoderma reesei Rut C-30 was studied through adding bran in appropriate amounts and investigating suitable ratio of bran to microcrystalline cellulose by software of Design-Expert. The results showed that bran in appropriate amounts could accelerate the production of cellulase. The optimal conditions for cellulase production obtained by the design of rotation-regression-orthogonal combination were 12.23 g/L of microcrystalline cellulose and 23.50 g/L of bran.Filter paper activity and yield coefficient in 250 mL shake flask was 6.383 FPIU/mL and 521.913FPIU/g, respectively. Filter paper activity and yield coefficient in 7.5L fermentor was 6.807 FPIU/mL and 556.582 FPIU/g, respec-tively. Filter paper activity in shake flask and fermentor increased 14.247% and 17.403%, after optimization, respectively. Yield of cellulase decreased 6.584% and 4.005%, respectively. Filter paper activity were 1.953 FPIU/mL and 1.745 FPIU/mL, when replacing microcrystalline cellulose with dilute acid pretreated poplar and steam exploded poplar, respectively.

Key words: Trichoderma reesei, cellulase, the design of the rotation-regression-orthogonal combination, specific cell growth rate, specific cellulase production rate

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